[Harzmounty]

Hi David,

thanks for the quick answer.

But the concerning books do have a series index.

When transfering a single book without any series I get the following (same) error:
---------------------
calibre, version 3.37.0
FEHLER: Fehler: Fehler beim Kommunizieren mit dem Gerät

float argument required, not NoneType

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 87, in run
File "site-packages\calibre\gui2\device.py", line 540, in _sync_booklists
File "calibre_plugins.kobotouch_extended.device.driver" , line 476, in sync_booklists
File "site-packages\calibre\devices\kobo\driver.py", line 968, in sync_booklists
File "site-packages\calibre\devices\kobo\driver.py", line 2513, in update_device_database_collections
File "site-packages\calibre\devices\kobo\driver.py", line 3046, in set_core_metadata
TypeError: float argument required, not NoneType
----------------------------

Any Thoughts?

P.S. see screen copy attachment